H3C Technologies H3C S12500-X Series Switches - Manual (Page 57)

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Step Command Remarks
3. Configure the priority of the
router in the VRRP group. vrrp ipv6 vrid virtual-router-id
priority priority-value
The default setting is 100.
4. Enable the preemptive mode
for the router in a VRRP group
and configure the preemption
delay time.
vrrp ipv6 vrid virtual-router-id
preempt-mode [ delay
delay-value ]
By default, the router in a VRRP
group operates in preemptive
mode and the preemption delay
time is 0 seconds, which means an
immediate preemption.
5. Associate a VRRP group with
a track entry.
vrrp ipv6 vrid virtual-router-id track
track-entry-number [ reduced
priority-reduced | switchover ]
By default, a VRRP group is not
associated with any track entry.
Configuring IPv6 VRRP packet attributes
This section describes how to configure IPv6 VRRP packet attributes.
Configuration guidelines
• The routers in an IPv6 VRRP group can have different intervals for sending VRRP advertisements. The
master in the VRRP group sends VRRP advertisements at the specified interval and carries the
interval attribute in the advertisements. After a backup receives the advertisement, it records the
interval in the advertisement. If the backup does not receive a new VRRP advertisement from the
master when the timer (3 x recorded interval + Skew_Time) expires, it regards the master as failed
and takes over as the new master.
• A high volume of network traffic might cause a backup to fail to receive VRRP advertisements from
the master within the specified time, resulting in an unexpected master switchover. To solve this
problem, configure a larger interval.
Configuration procedure
To configure the IPv6 VRRP packet attribute:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Configure the IPv6 VRRP
advertisement interval.
vrrp ipv6 vrid virtual-router-id
timer advertise adver-interval
The default setting is 100
centiseconds.
To maintain system stability,
H3C recommends setting the
VRRP advertisement interval to
be greater than 100
centiseconds.
4. Return to system view. quit N/A
5. Configure a DCSP value for IPv6
VRRP packets.
vrrp ipv6 dscp dscp-value
The DSCP value identifies the
packet priority during
transmission.
By default, the DCSP value for
IPv6 VRRP packets is 56.